Step 1In a large bowl, whisk together the flour with the baking soda, baking powder, salt and nutmeg.
Step 2In the bowl of a stand mixer using the paddle attachment, or in a large bowl using a hand mixer, cream together the margarine with the sugar and powdered sugar until well blended. Add the eggs, one at a time, until combined, then beat in the vanilla. Add the oil and flour mixture, one-fourth of each at a time, until combined to form a dough. Cover and refrigerate the dough until well-chilled, at least 2 hours.
Step 3Heat the oven to 350 degrees. Take a heaping tablespoon of dough and roll it into a ball. Place the ball on a cookie sheet and press down with the bottom of a glass dipped in sugar to flatten the cookie. Repeat with the remaining dough, spacing the cookies about 2 inches apart.
Step 4Bake the cookies until set and lightly colored on the edges, about 10 minutes. Cool on a wire rack.